Summer Changes (IMAGE) Brown University Caption A new study shows that lakes across northern Canada and Alaska are far more dynamic during the summer than researchers had thought. The animation shows lake area change over time in Alaska's Yukon Flats. Credit Sarah Cooley Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.